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" If "cos theta=(-7)/(25)" and ",theta i...

`" If "cos theta=(-7)/(25)" and ",theta in((5 pi)/(2),3 pi)" then "sin(theta/2) =(-4)/(5), cos(theta/2)=(3)/(5),sin(theta/2)=(-3)/(5), cos(theta/2)=(-4)/(5)`

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